Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX: 820

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-820 A Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122      
603-820 0 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2008-05-12   
603-820 1 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2010-02-28   
603-820 2 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2010-02-28   
603-820 3 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2010-02-28   
603-820 4 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2010-10-23   
603-820 5 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2010-10-23   
603-820 6 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2010-10-23   
603-820 7 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2012-01-21   
603-820 8 Merrimack NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2008-09-10   
603-820 9 Merrimack NH MNCHNHNI9MD  5562 METROPCS, INC. 122   2014-11-06   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.